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Infiltration of the sternotomy wound and the mediastinal tube sites with 0.25% levobupivacaine as adjunctive treatment for postoperative pain after cardiac surgery*

Published online by Cambridge University Press:  01 October 2008

S. Kocabas ,
D. Yedicocuklu ,
E. Yuksel ,
E. Uysallar  and
F. Askar
S. Kocabas*
Affiliation:
Ege University, Faculty of Medicine, Department of Anaesthesiology and Reanimation, Izmir, Turkey
D. Yedicocuklu
Affiliation:
Ege University, Faculty of Medicine, Department of Anaesthesiology and Reanimation, Izmir, Turkey
E. Yuksel
Affiliation:
Ege University, Faculty of Medicine, Department of Anaesthesiology and Reanimation, Izmir, Turkey
E. Uysallar
Affiliation:
Ege University, Faculty of Medicine, Department of Anaesthesiology and Reanimation, Izmir, Turkey
F. Askar
Affiliation:
Ege University, Faculty of Medicine, Department of Anaesthesiology and Reanimation, Izmir, Turkey
*
Correspondence to: Seden Kocabas, Cemal Gursel Caddesi, 418/9, Gunaydin Apt, 35530 Karsiyaka-Izmir, Turkey. E-mail: nskocabas@hotmail.com; Tel: +90 232 3695394; Fax: +90 232 3390002
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Summary

Background and objective

This study aimed to investigate the effect of 0.25% levobupivacaine infiltration of the sternotomy wound and the mediastinal tube sites on postoperative pain, morphine consumption and side-effects in patients undergoing cardiac surgery.

Methods

After obtaining Ethics Committee approval and informed consent, 50 patients aged 18–65 yr, undergoing coronary artery bypass grafting, were included in this study. Anaesthesia was induced with 5 μg kg−1 fentanyl, 0.3 mg kg−1 etomidate, 1 mg kg−1 lidocaine, 0.1 mg kg−1 vecuronium and maintained with 1–2% sevoflurane, 50% oxygen in air and fentanyl. Patients were randomized into two groups before sternal wire placement: sternotomy and mediastinal tube sites were infiltrated with either 60 mL 0.25% levobupivacaine (infiltration group, n = 25) or 60 mL saline placebo (control group, n = 25). All patients received intravenous morphine patient-controlled analgesia (bolus dose: 2 mg, lock-out time: 15 min, 4 h limit: 20 mg) after extubation. Postoperative pain at rest and on coughing was assessed by a visual analogue scale (0–10). Pain scores, sedation scores (Ramsay scale), haemodynamic and respiratory parameters, arterial blood gases and morphine consumption were recorded.

Results

The times to extubation and visual analogue scale scores were similar between groups. Morphine consumption at 24 h was significantly lower in the infiltration group compared with the control group (29.5 ± 5.1 vs. 42.8 ± 4.7 mg, respectively, P < 0.05). The sedation scores were found to be significantly higher in the control group when compared with the infiltration group at 1, 2 and 4 h after extubation (P < 0.05), whereas sedation scores after 4 h were similar between groups.

Conclusion

Infiltration of the median sternotomy incision and the mediastinal tube insertion sites with 0.25% levobupivacaine in addition to morphine patient-controlled analgesia was found to be effective in reducing postoperative morphine consumption when compared with morphine patient-controlled analgesia alone during the initial 24 h after cardiac surgery.

Keywords

CARDIAC BYPASSPAIN ACUTE AND POSTOPERATIVEANAESTHESIA CONDUCTION
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 25 , Issue 10 , October 2008 , pp. 842 - 849
Copyright
Copyright © European Society of Anaesthesiology 2008

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Footnotes

*

This study was presented at the 22nd Annual Meeting of the European Association of Cardiothoracic Anaesthesiologists (EACTA) in Krakow, Poland, between 13 and 16 June 2007.

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